code: def janoschek(x, a, beta, k, delta):
      return a - (a - beta) * np.exp(-k * x**delta)
  
imports: import scipy
  import logging
  import numpy
  import time
  from scipy import optimize
label_desc: Use image node_id 12 for calling a global function with example usage: janoschek(x, a, beta, k, delta) and returns: unknown